Boiler for traction-engines.



T. J. BROWN.

BOILER FOR TRACTION ENGINES.

APPLICATION FILED 00122, 1912. RENEWED APR. 14, 1914.

1,097,523. Patented May 19, 1914.

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Guyana;

COLUMBIA PLANOGRAPH 60., WASHING 1m. D. 0.

THOMAS 0'. BROWN, 0]? GRAWFORDSVILLE, IOWA.

BOILER FOR TRACTION-ENGINES.

nuances.

Specification of Letters Patent.

Patented ltIay 1t), 1914.

Application filed October 2, 1912, Serial No. 723,620. Renewed April 14,1914. Seria1 No. 831,795.

To all whom it may concern:

Be it known that I, TrroMAs J. Brown, a citizen of the United States,residing at Crawfordsville, in the county of "Washington and State ofIowa, have invented certain new and useful Improvements in Boilers forTraction-Engines; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to boilers for traction engines; and it consistsin certain pipes provided with valves and connected to the steam spaceof the boiler at the opposite ends thereof so that dry steam can beobtained irrespective of the level of the ground over which the engineis traveling.

In the drawings, Figure 1 is a side view of the boiler of a tractionengine, partly in section, constructed with steam pipes and valvesaccording to this invention. Fig. 2 is a cross-section taken on the lineww in Fig. 1. Fig. 3 is a partial view similar to Fig. 1, andillustrates a modification of the arrangement of the steam pipes.

The boiler is provided with a shell 2, a fire-box 3, a smoke-box 4L, andfire-tubes 5 between the fire-box and smoke-box. All of these parts areof any approved construction. The dotted line 7 indicates the normalwater-level when the engine is traveling on level ground. The dottedlines 8 and 9 indicate the water-levels when the engine is traveling upand down a steep hill respectively.

In order to prevent the water from passing from the boiler with thesteam when the engine is traveling up-hill or downhill, a steam pipe 10is secured longitudinally of the boiler from one end portion to theother and its ends communicate with the steam space at the respectiveends of the boiler. An outlet pipe 11 is connected to the intermediateportion oi the pipe 10 at any convenient part of its length, and thesteam pipe 10 may be formed in sections which are connected together andto the outlet pipe 11 by a T-junction 12.

A valve 14 is provided for closing the front end of the steam pipe 10,and a valve 15 is provided for closing its rear end, each end of thepipe 10 being provided with a suitable valve-seat. The two valves 14 and15 are connected together by a conpling-rod 1G, and an extension of thecou pling-rod forms a valve-operating rod 17. A lever 18 is pivoted tothe shell of the boiler and is connected to the rod 17, but any otherapproved means may be used for operating the valvc-rod.

The steam pipe 10 is preferably arranged inside the shell of the boiler,and the valverod 17 passes through a stuliing-box 19 so that steam fromthe boiler cannot leak out around the valve-rod. The steam outlet pipe11 is secured in a hole in the shell of the boiler under andcommunicating with a steam dome 20, and the steam dome 20 is not placedin direct communication with the steam space of the boiler as in boilersas ordinarily constructed. Condensed steam or water in the steam dome 20drains back through the pipes 11 and 10. The boiler is provided with asteam regulating-valve 0r stop-valve 21 of any approved construction.

The valves 14 and 15 are adjusted and secured so that both ends oi thesteam pipe 10 are open simultaneously when the valves are at theirmiddle positions. When the engine is going up-hill and the valve 15 atthe rear end of the pipe 10 is submerged, the valve 15 is closed by handand the valve 14 is opened, and when the engine is traveling downhillthe valve l l is closed and the valve 15 is opened. In this manner thesteam engine is always supplied with dry steam irrespective oi the levelof the ground.

In the modification shown in Fig. 3, the steam pipe 10 is arrangedoutside the boiler, and its end portions are connected to the shell ofthe boiler by headers 24: and 25 which form extensions of the steamspace oi the boiler shell. The valve rod 17 is a continuation of thecouplingrod 1G, and no levers have to be placed in the steam space ofthe boiler where they are liable to be injured by deposits of scale fromthe water, and where they are ditiicult of access and inconvenient torepair.

What I claim is:

1. The combination with a traction engine boiler, of a steam pipearranged longitudinally or the boiler with its ends communicating withthe steam space, lift valves for closing the ends of the steam pipe, acoupling-rod extending through the steam pipe and having the said valvessecured to it, said coupling-rod having an extension which projects fromthe steam space of the boiler :10

end plate of the boiler, a dome provided with a steam outlet and securedto the boiler out of direct communication with its steam space, and anoutlet pipe connecting the steam space of the dome with the said steampipe between its valves.

In testimony whereof I have aflixed my signature in the presence of twowitnesses. THOB IAS J. BROWN. Witnesses NETTIE BROWN, EDITH HoUGH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

